Detect Circle like Hough transform

Hi All,

I would like to detect circle on image - already edge detected and threshold-ed . Circle is white on black background. And I would like to overlay detected circle over white pixels.

NI IMAQ Detect Circles is detecting circle on edge between black and white pixels. And two circles are detecting as well, one internal on black->white edge and second on white->black edge.

As you should see picture could be 'noise' and from this reason something like Hough transform would be best. I think.

Thank you for your time.

Best regards

 Peter